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US 11,890,481 B2Granted
AV nodal stimulation during atrial tachyarrhythmia to prevent inappropriate therapy delivery
AssigneeMedtronic, Inc.
InventorsEduardo N. Warman, John E. Burnes, Koen J. Michels, Paul D. Ziegler, Lillian Kornet
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Abstract
The disclosure describes techniques for delivering electrical stimulation to decrease the ventricular rate response during an atrial tachyarrhythmia, such as atrial fibrillation. AV nodal stimulation is employed during an atrial tachyarrhythmia episode with rapid ventricular conduction to distinguish ventricular tachyarrhythmia from supraventricular tachycardia and thereby prevent delivering inappropriate therapy to a patient.
Claims20
A system comprising:
- a stimulation generator configured to deliver electrical stimulation to a patient;
- a sensing module configured to sense activity of the patient's heart;
- and
- a processor coupled to the sensing module and configured to:
- anticipate a ventricular tachyarrhythmia in a heart of a patient based on the ventricular tachyarrhythmia not yet being detected but a counter reaching a threshold value of a ventricular tachyarrhythmia event count;
- determine a sense time period;
- and
- in response to anticipating the ventricular tachyarrhythmia, control the stimulation generator to deliver electrical stimulation to block the atrioventricular node of the heart over an electrical stimulation delivery time period, wherein the electrical stimulation delivery time period is based on the sense time period over which ventricular depolarizations can be sensed during the electrical stimulation delivery time period, the electrical stimulation delivery time period being bounded by limits that prevent an accumulation of blanking periods applied to a sensing amplifier that would exceed the sense time period.
5 more elements
A system comprising:
- a stimulation generator configured to deliver electrical stimulation to a patient;
- and
- a processor configured to:
- increment a counter upon detection of a ventricular tachyarrhythmia event;
- anticipate detection of a ventricular tachyarrhythmia in a heart of a patient based on the ventricular tachyarrhythmia not yet being detected but a counter reaching a threshold value of a ventricular tachyarrhythmia event count;
- measure an RR interval;
- determine, using the RR interval, a sense time period over which ventricular depolarizations need to be sensed in order to detect development of the ventricular tachyarrhythmia;
- determine a stimulation time period based on the sense time period;
- in response to anticipating detection of the ventricular tachyarrhythmia, control the stimulation generator to deliver electrical stimulation to block an atrioventricular node of the heart over a first time period regardless of the sense time period;
- and
- control the stimulation generator to deliver the electrical stimulation during the stimulation time period over a second time period after the first time period, the stimulation time period being bounded by limits that prevent an accumulation of blanking periods applied to a sensing amplifier that would exceed the sense time period.
8 more elements
Dependencies are inferred from the claim text.